Aid worker dies after armed attack in South Sudan

• A staff member of Doctors Without Borders died this week, the group says


• The car he and another worker were traveling in came under attack


• The other staff member remains seriously wounded


• Doctors Without Borders calls for an investigation into the “brutal attack”

(CNN) — A staff member of the aid organization Doctors Without Borders has died after an attack on a vehicle near the capital of South Sudan, the group said Friday.

The aid worker, Joseph Philip Sebit, died two days after the attack, which took place Monday on a main road outside the capital, Juba, according to Doctors Without Borders.

A second employee for the organization remains seriously wounded, the group said.

Doctors Without Borders, also known as Medecins Sans Frontieres, said that the “exact circumstances” of the attack aren’t yet clear, but the car in which its two staff members were traveling was “clearly marked as belonging to Medecins Sans Frontieres.”

The organization has requested that South Sudanese authorities “investigate the brutal attack that resulted in the killing of our colleague,” said Marcel Langenbach, director of operations for the group.

“We want to emphasize the need to respect international humanitarian law and on the obligation to ensure the protection of humanitarian workers, their property and health facilities,” he said.

Doctors Without Borders said it had been working in the region for more than 30 years.

South Sudan officially gained its statehood in July 2011 after separating from Sudan.

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Aid worker dies after armed attack in South Sudan